From the Rolls-Royce experimental archive: a quarter of a million communications from Rolls-Royce, 1906 to 1960's. Documents from the Sir Henry Royce Memorial Foundation (SHRMF).
Tests to find methods of overcoming torque reaction vibration periods.
| Identifier | WestWitteringFiles\K\October1923\ Scan0 | |
| Date | 1st October 1923 | |
| R.R. 493 (40 H) (SL 42 12-7-23). J.H., D.{John DeLooze - Company Secretary} ORIGINAL EXPERIMENTAL REPORT. COPIES TO: R.C.J. BJ. WOR.{Arthur Wormald - General Works Manager} By.{R.W. Bailey - Chief Engineer} E.{Mr Elliott - Chief Engineer} Da.{Bernard Day - Chassis Design} EP.{G. Eric Platford - Chief Quality Engineer} PN.{Mr Northey} OY. Expl. No. X.634 REF. Hs{Lord Ernest Hives - Chair}7/LG1.10.23. OBJECT OF TEST. To find means of overcoming torque reaction vibration periods. TESTER. T. M.{Mr Moon / Mr Moore} Warwick. CONDITIONS. 2-G-11 open touring car - other cars - tests carried out on the road. SUMMARY OF TEST. The results of tests so far on 20 HP. engine mounting tend to show the following points :- (1) Friction added to standard 20 HP. engine effects 75% improvement to the torque reaction and retard vibrations. (2) Adding weight to balance engine about centre of gyration always affects an improvement. We have still to prove whether it is the inertia effect of the weight and not the balancing which effects the improvement. (3) The best mounting we have had so far for elimination of vibration periods is - engine supported on centre line of crankshaft and a fixed torque arm from timing gear case to frame - friction makes very little difference with this. Hs.{Lord Ernest Hives - Chair} | ||